Functions: It can measure pH,mV(ORP) and temperature. The instrument is equipped with large LCD Touch Screen and English operation system for easy use. Several kinds of pH buffer solution can be chosen for instrument calibration. Furthermore, the buffer solution can be prepared by users. The instrument can recognize five types of buffer solution automatically. It has many functions such as automatic and manual temperature compensation, self-calibration and self-calculation of electrode percentage theoretical slope. The data can be stored, deleted, printed and viewed, and the quantity of measuring data can be maximized to 200 sets. It has standard RS-232 and USB interface. To match with data collecting software, it can be communicated with computer. It is equipped with E-201-D pH combined electrode and T-820C temperature electrode. Specifications: 1¡¢Measuring range pH£º£¨-2.000~18.000£©pH mV£º£¨-1999.99~1999.99£©mV Temperature: £¨-5.0~105.0£©¡æ 2¡¢Resolution pH£º0.1 pH ¡¢ 0.01 pH ¡¢0.001pH mV£º0.1mV ¡¢ 0.01mV Temperature: 0.1¡æ 3¡¢Accuracy: pH£º¡À0.002pH¡À1 bit mV£º¡À0.03% FS Temperature: ¡À0.2¡æ¡À1 bit 4¡¢Input impedance>=3¡Á1012¦¸ 5¡¢Stability: £¨¡À0.002pH ¡À1 bit£©/3h 6¡¢Temperature compensation range: manual/automatic £¨-5.0¡«105.0£©¡æ 7¡¢Power supply: AC (220V¡À22) V£»(50Hz¡À1)Hz 8¡¢Dimension£¨mm£©£º250¡Á195¡Á100 9¡¢Weight:2kg 370*310*340mm/unit 4kg